Regarding the nerfing the alchemists...I don't understand why they had to be nerfed on lower difficulties. They do almost no damage at low difficulties, even if you had taken NO life passives. I can sit in poison clouds for quite a while, with only 200hp.

The main issue with Alchemists is in later difficulties, where they're damage goes way up in comparison to your max health, especially when it's difficult to get chaos resists. I think they needed a nerf in later difficulties, not earlier ones.